Should I be concerned?

Their temperament this season
has been erratic,
predicting their mood futile

At times, they’ve come and gone,
fleeting as a shadow
in the wind

Other times, their ominous growl
and lightning gaze
are almost wrathful

They come in packs now,
with no discernible
order or formation,
yet follow their usual path

Scattered at first,
they sweep across my view,
indifferent to my concern

They soon cluster,
seeming to cover the landscape
like a blanket

No darkness,
no malevolence
accompanies them

A light rain starts to fall,
a light breeze the last gasp
of a summer too wet

And my question is answered